Stereopticon



W. R. MENGEL.

STEREOPTICON.

APPLICATION FILED MAR. 29, 1918. RENEWED NOV. 13,1919.

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STEREOPTICON.

APPLl-CATION FILED MAR; 29, 1918. RENEWED NOV. 13,1919.

1,342,561- E PatentedJune'S, 1920.

3 SHEETS-SHEET 2.

I ATTORNEY W. R. MENGEL.

. STEREOPTICON.

APPLICATION FILED MAR. 29, 1918- RENEWED NOV. 13,1919.

, 1,342,561 1 Patented June 8, 1920.

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INN 49 60 J! /J9 a 1 a W? L w 3 J6. E5; $5M 1 a f 6a a.

Q 'A i 5 F v r I l/VI/EA/ TOR IIIIIIIIIIIIIIIATI(IIIIIII(!AW f BY 2; ATTORNEY I UNITED STATES PATENT OFFICE.)

WILLIAM MENGEL, or CHICAGO, ILLINOIS.

srEnEorTIcoN.

R. MENGEL,

which the following is the specification.

This invention relates to that class of portable stereopticons in which the mam inclosing casing is of the suit-case form,

and in which the series of views or pictures are on a transparent band or strip, and the present improvement has for its object To provide va simple and eflicient structural formation and association -of parts,

whereby the heat from the incandescent lamp used as the source of illumination of the apparatus, is effectively intercepted and carried away before reaching the inflammable film upon which the series of views or pictures are printed, all as will hereinafter more fully appear. I

In the accompanying draw1ng s: I Figure 1, is a side elevation Illustrating the general association of parts in the present invention, the inclosing caslng be ng shown in section and having the form of an ordinary suit case. I

Fig. 2, is a top View of the film feeding mechanism shown to the right in Fig. 1. V F igthe same.

Fig. 4, is a horizontal section'of the same on line mm, Fig. 3.

Fig. 5, is a fragmentary end elevation of the film feeding mechanism.

Fig. 6, is an elevation of the inner face of the apertured film guiding plate.

Fig. 7 is a detail elevation of the outer face of the same. I

Fig. 8, is an enlarged detail longitudinal section of the film feeding mechanism.

Fig. 9, is a longitudinal sectional elevalike tion of said film feeding mechanism.

Like reference numerals indicate parts in the several views.

Referring to the drawings, 20 designates the main inclosing casingof a rectangular box. or suit case form, as usual in the present type of stereopticons.

21 designates the lamp house of the usual I Specification of Letters Patent.

3, is a centrallongitudinalsection of I 26 designates a bracket frame attached to the lamp socket 23 and secured in a vertically adjustable manner to an upright post or standard 27 by a'set screw 28, thus pro- VldlIlg a vertical adjustment for the incandescent electric lamp 22. The post or standard27 is provided with a supporting base 29 adapted for longitudinal adjustment on the floor of the main casing 20 by means of a bolt 30 and wing nut 31 for the purpose of effecting an adjustment of the lamp 22 along the light center of the apparatus.

32 and 33 designate the pair of'le'nses constltutlng the condenser of the apparatus, and which in the present improvementare Patented June 8, 1920. I Application filed March 29,1918, Serial No. 225,418. Renew v m 13, 1919- Se' iaI'N 337.867,

mounted in the front and rear walls of a rectangular shell or casing 34, arranged 'im-.

mediately in front of the lamp house 21 and removably supported in place by transverse guides 36 and 37 upon the respective top and bottom walls of the main casing 20 as shown. v

35 designates a plurality of perforations in the side walls of the aforesaid shell or casing 34, adapted to permit of a very effective circulation of, air through the interior of said shell or casing to-intercept and carry off the heat rays in their passage between the pair of lenses 32, 33 aforesaid.

38 designates the frame or housing of the film carrying and actuating mechanism of the apparatus, arranged at the other end of the main casing 2 in line with thelamp house '21, and provided with the usual objective 39. I 40 and 41 designate the upper and lower film spools or reels journaled ontheframe I or housing 38 and having operative connectlonswlth the film actuating mechanism in manner hereinafter described.

43 designates the usual film guiding plate carriedby the frame or housing 38, and formed withthe usual light aperture 42, and with a shallow vertical recess 44 for the reception and guidance of the picture film in its movement past the light aperture 42 aforesaid.

51 designates a carrying head or block upon which the hereinafter described film feeding member 49 is mounted. Said carrying head or block is slidably mounted on vertical guiderods 52, fixedly arranged in bracket lugs 53 and 54 on the inner face of the film guiding plate 43 aforesaid, and the amount of movement of the carrying head 51 is regulated by an adjustment screw 55 mounted in the lower lug 53 aforesaid;

.The film feedin member 49 above referred to, is of a b ock form, pivoted by a pivot pin 50 on the carrying head 51 aforesaid, and having at one end teeth or detents.

48 adapted to project through vertical slots 47 formed in the film guiding plate 43 and operatively engage in the usual side perforations of the picture film.

' 56 desi ates a coil sprmg associated with the film eeding member 49 and tending to normally hold the teeth or detents 48 in a projiected POSltlOIl;

designates a toe or extension'on the film feeding member 49, adapted to engage the under surface of the upper lug. 54, so as to move the teeth or detents 48 out of the pro'ected position above described, when sai member 49 .isin its raised position, as shown in Fig. 8.

58 designates a spring the lower end of.

which has bearing'on the frame or' housing 38 aforesaid, while the upper end of sai spring is secured by means of a pin 59 to a lateralextcnsion 60 of the carrying head 51 aforesaid, the arrangement is such that the tension of the spring 58 will normally hold the carrying head 51 at the upward portion of its movement.

61 designates a vertically arranged operating rod or stem, the upper end of which extends through the to wall of the main casing 20 and is provi ed with an operating knob or handle 62, while its lower por tion is guided in guide lugs on the inner face of the film guiding plate 43 and has operative engagement with the carrying head 51, as shown in Fig. 6, to impart positive and will be formed with the usual light pas-- 41 will be simultaneously effected to take up the film as it is intermittently fed throughthe mechanism. v

66 designatesthe hinged gate by which the picture film is confined to the vertical guiding recess 44 of'the film guiding plate 43,

Y sage in line with the light aperture 42 of the associated film guiding plate 43.

67 designates a vertical plate or partition formed with a light opening 68 in line with" the light apertures of the film guiding plate 7 '43 and film confining gate 66, and in the presentimprovement said opening 68 is provided with-a transparent plate 69 of glass sociated with the film feeding .or the like. Said plate or partition 67 is secured in spaced relation to the rear face of the film confining gate 66 by horizontal studs or pins as. shown in Fig. 3, to provide an open space' between the parts adapted to provide a ventilating passage for the air and aid in intercepting and carrying away the heat rays passing along the light path of the apparatus.

70 designates a spring tending to hold the film confining gate 66in its normally closed position.

72 designates lateral lugs on the base of the frame .or housing 38 aforesaid, adapted to receive fastening screws 71 by which said frame or housing is secured to the floor of the main casing 20. r f

Having thus fully described my invention, what I claim as new and desire to secure by Letters Patent, is I [1. In a stereopticon, the combination of a main casing, a lamp house arranged at one end of said casing, a film feeding mecha nism arranged at the other end of said casng, a rectangular shell arranged insaid casing intermediate the lamp house and film feeding mechanism aforesaid and provided. with a plurality of perforations in its vertical side walls, and condenser lenses mounted in the front and rear walls of said shell, substantially as set forth. v

2. In a stereopticon, the combination of a main casing, a lamp house arranged at one end of said casing,.a film feeding mechanism arranged at the other end of said casing,'a rectangular shell arranged in said cas-.

ing intermediate the lamp house and film feeding mechanism aforesaid and provided with a plurality of perforations in its vertical side walls, condenser lenses mounted in the front and rear walls of said shell, a film confining gate associated with the film feeding mechanism aforesaid, and a vertical partition secured in spaced relation to said gate, substantially as set forth.

3. In a stereopticon, the combination of a main casing, a lamp house arranged at one end of said casing, a film feeding mechanism arranged at the other end of said casing, a rectangular shell arranged in said casing intermediate the lamp house and film feeding mechanism aforesaid and provided with a plurality of perforations. in its vertical side wal1s,-condenser lenses mounted in the front and rear walls of saidshell, a film confining ate asmec anism aforesaid, and a vertical partltion secured in spaced relation to said gate and provided with a lightopening having a transparent closure, substantially as set forth.

.In testimony whereof, I have signed the foregoing specification.

WILLIAM R. MENGEL. 

